Firefox Extensions

It would be nice if you were up to date with the firefox versions and your extension articles. for the last 3 times I've tried an extension suggested by How-To Geek, All I get is incompatibility notices for my Firefox toolbars. The very latest was the article on the Smart Bookmarks Bar I don't use Windows anymore so the only reason I still subscribe to the newsletter is for the Firefox articles...am thinking maybe the only help would be to unsubscribe from How-To Geek totally. Maybe I'm doing something wrong but I'm very careful in reading the directions. Any comments would be greatly appreciated?